A checkpoint static modul. Contains skin and behaviour.

modul checkpt()

var ctx = modul.context;

// Skin
function checkpt(ledColor){
  function circle(x, y, r, col){
    ctx.beginPath();
    ctx.fillStyle = col;
    ctx.arc(x, y, r, 0, Math.PI * 2, false);
    ctx.closePath();
    ctx.fill();
  }
  function drawRotated(originx, originy, distance, size, color, steps) {
    ctx.save();
    ctx.translate( originx, originy );
    for (var i=0;i<steps;i++){
      ctx.rotate(360/steps*Math.PI/180);
      circle(distance,distance,size,color);
    }
    ctx.restore();
  }
  drawRotated(25, 25, 16, 3, '#999', 12);
  circle(25,25,23,'rgba(200, 200, 200, 1)');
  circle(25,25,22,'rgba(230, 230, 230, 1)');
  circle(25,25,8,'rgba(70, 70, 70, .7)');
  circle(25,25,7,ledColor);
  circle(25,23,3,'rgba(255, 255, 255, .6)');
  drawRotated(25, 25, 12, 2, '#ccc', 4);
}

// You can fill your own panel
// Here is the default "Actions" panel
var actionsPanel = ui.buttonsPanel("Actions", [
  ui.button("ON", activate),
  ui.button("OFF", desactivate),
  ui.button("goto", initGoto),
  ui.button("stopGoto", stopGoto)
]);

var activeGoto = false;
var posGoto = [0,0];
function goto() {
  var c = modul.coordinates();
  if (c[0] > posGoto[0]) {
    modul.move("left");
  } else if (c[0] < posGoto[0]) {
    modul.move("right");
  }
  if (c[1] > posGoto[1]) {
    modul.move("top");
  } else if (c[1] < posGoto[1]) {
    modul.move("bottom");
  }
  if (c[0] === posGoto[0] && c[1] === posGoto[1]) {
    ui.log("End of the trip!"); // never shown?
    activeGoto = false;
  }
}
function initGoto(x, y) {
  posGoto = [x, y];
  activeGoto = true;
}
function stopGoto() {
  ui.log("Trip stopped"); // never shown?
  activeGoto = false;
}

world.on('interval', function(){
  if (activeGoto) goto();
  if (activated) com('<3');
});

// emission
var activated = true;
function com(msg){
  var siblingModuls = modul.sonar();
  if(siblingModuls.length === 0){
    checkpt('grey');
  }else{
    checkpt('#00FF00');
    var modul1 = siblingModuls[0];
    var modulimg = modul1.image();
    modul1.send(msg);
    ui.log("Sent: “"+msg+"”");
  }
}
function desactivate() {
  activated = false;
  checkpt('grey');

}
function activate() {
  activated = true;
}

// Apply skin
checkpt('grey');